Configuring WinWarbler for RTTY Operation

on the Configuration window's Soundcard tab, select the Soundcard to be used in the PSK & RTTY Reception panel; if transmitting via AFSK, select the Soundcard to be used in the the Transmission panel's PSK & RTTY sub-panel

on the Main window,

set the Operating Mode panel to RTTY

on the Configuration window's RTTY tab

check the enabled box

set the Speed to 45.45

set the Shift to 170

set the Default TxPwer to the RF power output (in watts) that you'll be using

WinWarbler can be configured to generate the FSK signal on the TxD, RTS, or DTR pins of any available serial port. If you are using a USB-to-serial-port adapter and will be configuring WinWarbler to generate the FSK signal on the TxD pin, then this USB-to-serial-port adapter must support 5-bit operation at 45 baud, and you must configure the MMTTY engine to transmit characters at a rate that the USB-to-serial-port adapter can handle:

set the Main window's Operating Mode panel is set to RTTY

on the Configuration window's RTTY tab,

check the Enabled box

click the MMTTY Setup button

on the MMTTY Setup window's Misc tab

set the Tx port panel to COM-TxD (FSK)

click the USB button

in the USB Port Option window, select the C: Limiting Speed option and click the OK button to close the window

close the MMTTY Setup window by click the OK button in its lower-right corner

If you are using a USB-to-serial-port adapter and will be configuring WinWarbler to generate the FSK signal on the RTS or DTR pins, then support for 5-bit operation at 45 baud is not required.

To use the PTT serial port's TxD pin, open the Config window's PTT tab and note the serial port selected in the PTT panel's Port tab. Select the Config window's RTTY tab, and in the Modulation and transceiver mode panel's FSK section,

click the LSB button

set the FSK Control selector to the same serial port selected in Port panel on the Config window's PTT tab

For more flexibility in serial port selection or to utilize a USB-to-serial-port adapter that does not support 5-bit operation at 45 baud, open the Config window's RTTY tab, and in the Modulation and transceiver mode panel's FSK section,

click the LSB button

set the FSK Control selector to ExtFSK

When the Main window's Operating Mode panel is set to RTTY with the Enabled box checked on the Config window's RTTY tab, an EXTFSK icon will appear in the Windows Task Bar along the bottom of your monitor. Click this EXTFSK icon to open the EXTFSK window; in this window,

set the Port selector to the desired serial port

set the FSK output panel to TxD, RTS, or DTR as desired (if using a USB-to-serial-port adaptor that doesn't support 5-bit operation at 45 baud, choose RTS or DTR)

The EXTFSK icon will appear in the Windows Task Bar whenever you operate in soundcard RTTY mode, but it will remember the settings you've established, so subsequently opening the ESTFSK window is unnecessary.

if you are running on Windows Vista, 7, 8, or 10, your soundcard driver's sample rate should be an integral multiple of the MMTTY engine's clock rate. The MMTTY engine's default clock rate is 11,025 hz; the default sample rate for most sound card drivers is 48,000 hz, which is not an integral multiple of 11,025 hz. To address this, on the Configuration window's RTTY tab, click the MMTTY Setup button to make the MMTTY engine's Setup window appear on screen; on the MMTTY Setup window's Misc tab,

in the Clock panel, change the clock selector from 11025 to 12000

click the MMTTY Setup window's OK button

on the Configuration window's Display tab, click the Set Default Colors button

on the Main window,

in the Receive panel,

check the AFC box

uncheck the BPF box

uncheck the Reverse box

set the Squelch Threshold to ~25 by clicking in the Signal Quality display to position the Squelch Bar:

in the Transmit panel,

check the net box

uncheck the reverse box

in the Tuning Display panel,

set the Vert height to 1.0

set the Horiz zoom to 1

Other RTTY options

Decoding and generating CW, RTTY, and other digital modes by a controlling an external Modem connected to a serial port; supported modems include the KAM 98, MFJ 464, PK232, PK900, and PTC-IIe